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<title>系统错误 (500)</title> 
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            border-right-color: #999;
            border-bottom-color: #999;
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        h1 { font-size: 100%; color: #f00; line-height: 1.5em; }
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<body> 
  <div class="dialog"> 
    <h1>系统错误</h1> 
    <p>抱歉！您的操作出现异常，请稍后重试或联系管理员。</p> 
    <p><a href="javascript:;" onclick="history.back(); return false;">返回上一页</a></p>
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